Stuff is expensive but I've tried just about all the major pres on the market and this is the best for me... much cleaner energy and no proprietary ingredients which is helpful. No crazy spike, no crash (again, for me)... I work out super early morning and this was the first Pre that has me cranking for a full hour at the gym. First time I used it I ran 3 miles on a treadmill at the end of my workout just because I felt like I could. I also don't even need a full dose of this so it ends up lasting a little bit longer.
Post workout I rotate through whatever high quality whey I can get my hands on for the cheapest.... right now I"m using the JYM protein mix and I actually really like it.